TSB 09-6-1
They'll have your truck for a couple of days as they'll need to pull the tranny and replace the overdrive friction plates. I just had it done to my '08.
TSB 09-6-1
04/06/09
6R75 TRANSMISSION - SQUAWK NOISE DURING
POWER/FORCED DOWNSHIFT
FORD:
2007-2008 Expedition
This article supersedes TSB 08-19-8 to update the vehicle model years and remove the production fix date.
ISSUE
Some 2007-2008 Expedition vehicles equipped with a 6R75 transmission may exhibit a squawk type noise during hard acceleration down shifts (4-3), (5-3) and (6-3) downshifts. The noise is produced during the release of the overdrive clutch.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
Follow Workshop Manual (WSM), Section 307-01B to replace the overdrive friction plates.
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT : Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.